What is wrong in this global variable definition

[layoutmask]

(defglobal *mySheetResistanceTable*
'(
("M1" 0.08) ; Example value for Metal 1
("M2" 0.08) ; Example value for Metal 2
("M3" 0.05) ; Example value for Metal 3
("M4" 0.05) ; Example value for Metal 4
("M5" 0.02) ; Example value for Top Metal 1
("M6" 0.02) ; Example value for Top Metal 2
("poly" 5.0) ; Example value for Polysilicon
; --- Add all other conductive layers from your PDK here ---
)
)

If I try to execute this code in cadence ciw i am getting error as : unbound variable - defglobal

Thanks for your help,
Layoutmask